This pretty new Yakima from Plymouth is really cool!
It's a single ply fingering weight yarn with some lovely dark halo action happening thanks to the 15% yak content. Several folks on Ravelry are making a Belmina lace cowl/kerchief sort of thing.
I think I would try holding this yarn together with some mohair to pump up the dark halo affect.
I love this combo. It would make a nice Oslo hat too, perhaps? Any excuse to knit another hat.